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Nitrogen and phosphorus removal material and preparation method thereof

A technology for nitrogen and phosphorus removal and phosphorus removal agent, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as limited capacity, and achieve strong selection ability and continuous recycling effect Good, good denitrification effect

Inactive Publication Date: 2019-01-01
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although iron-carbon micro-electrolysis has a certain effect of phosphorus removal, but the capacity is limited. At present, iron-carbon materials are mainly used for the oxidation of organic matter in wastewater and the reduction of nitrate nitrogen.

Method used

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  • Nitrogen and phosphorus removal material and preparation method thereof
  • Nitrogen and phosphorus removal material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Example 1 Nitrogen and Phosphorus Removal Material

[0031] According to the mass ratio: reduced iron powder: activated carbon powder: bentonite: copper powder: roasted Mg-Al hydrotalcite: PEG-200 is 40.25: 12.75: 25: 2: 10: 10 Weigh raw materials (can be weighed in g or kg Take), mix iron powder, activated carbon powder, bentonite, copper powder and hydrotalcite-like evenly. Dilute PEG-200 in a small amount of deionized water to reduce the viscosity, and add it to the evenly mixed iron powder and other raw materials. Add an appropriate amount of deionized water and stir until it is suitable for granulation, and prepare granules with a particle diameter of 8 mm. The prepared granules were dried in a vacuum oven at 105° C. for 2 h. Then put the material into a vacuum tube furnace, under the environment of nitrogen as a protective gas, first keep it at 300°C for 30 minutes, then raise the temperature to 1000°C and keep it for 120 minutes, and finally cool...

Embodiment 2

[0033] Preparation of Example 2 Nitrogen and Phosphorus Removal Materials

[0034] According to the mass ratio: reduced iron powder: activated carbon powder: bentonite: copper powder: roasted state Zn-Fe hydrotalcite: PEG-300 is 31.25: 13.75: 23: 2: 10: 20 Weigh raw materials (can be weighed in g or kg Take), mix iron powder, activated carbon powder, bentonite, copper powder and hydrotalcite-like, dilute PEG-300 in a small amount of deionized water to reduce the viscosity, and add it to the evenly mixed iron powder and other raw materials. Add an appropriate amount of deionized water and stir until it is suitable for granulation, and prepare granules with a particle diameter of 4 mm. The prepared granules were dried in a vacuum oven at 105° C. for 1 h. Then put the material into a vacuum tube furnace, under the environment of nitrogen as a protective gas, first keep it at 400°C for 30 minutes, then raise the temperature to 1100°C and keep it for 120 minutes, and finally cool ...

Embodiment 3

[0036] Preparation of Example 3 Nitrogen and Phosphorus Removal Materials

[0037] According to the mass ratio: reduced iron powder: activated carbon powder: bentonite: indium powder: roasted Ni-Fe hydrotalcite: PEG-400 is 45:20:20:2:8:5 Weigh raw materials (can be weighed in g or kg Take), mix iron powder, activated carbon powder, bentonite, indium powder and hydrotalcite-like, dilute PEG-400 in a small amount of deionized water to reduce the viscosity, and add it to the evenly mixed iron powder and other raw materials. Add an appropriate amount of deionized water and stir until it is suitable for granulation, and prepare granules with a particle diameter of 15 mm. The prepared granules were dried in a vacuum oven at 105° C. for 3 h. Then put the material into a vacuum tube furnace, under the environment of nitrogen as a protective gas, first keep it at 300°C for 60 minutes, then raise the temperature to 900°C and keep it for 90 minutes, and finally cool it to 200°C with the...

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Abstract

The invention discloses a nitrogen and phosphorus removal material and a preparation method thereof, which belongs to the technical field of water pollution control. The nitrogen and phosphorus removal material comprises the following raw materials in parts by mass: 30 to 60 parts of reduction iron powder, 5 to 20 parts of active carbon powder, 20 to 40 parts of bentonite, 0.5 to 5 parts of a catalyst, 5 to 20 parts of a pore-forming agent, and 2 to 25 parts of a phosphorus removal agent. The nitrogen and phosphorus removal material can be used for removing nitrogen and phosphorus in water, nitrate nitrogen is chemically catalytically reduced to efficiently and selectively generate an expected product nitrogen, so that the secondary pollution is avoided, the effluent does not need to be treated, the process is simple, and the treatment cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a nitrogen and phosphorus removal material and a preparation method thereof. Background technique [0002] Efficient removal of nutrients such as nitrogen and phosphorus is one of the environmental problems faced by many polluted water bodies. Biological denitrification is a widely used denitrification technology at home and abroad. It generally includes two processes of microbial nitrification and denitrification. Denitrifying microorganisms need a certain amount of organic carbon to complete the denitrification process. Theoretically, when C / N is equal to or greater than 2.86, denitrification can be completed, otherwise an additional carbon source is required. Therefore, when the C / N ratio in sewage or water body is relatively low, the process of denitrification and denitrification is often limited. [0003] Using the large potential difference be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/42C02F1/461C02F1/70C02F101/10C02F101/16
CPCC02F1/281C02F1/283C02F1/461C02F1/70C02F2001/422C02F2101/105C02F2101/163
Inventor 全向春陈亮
Owner BEIJING NORMAL UNIVERSITY
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